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Microchip Technology MPLAD36KP18CA/TR
- Part No.:
- MPLAD36KP18CA/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP18CA/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:7,303
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Product details
Overview
MPLAD36KP18CA/TR from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) rated for 36,000 W peak pulse power at 10/1000 μs, with 18 V working standoff voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), and 30.8 V clamping voltage (VC) at 60 A peak impulse current. It delivers lightning and load dump protection in aerospace avionics per RTCA DO-160 Section 22.
For engineers reviewing the MPLAD36KP18CA/TR datasheet, MPLAD36KP18CA/TR pinout, MPLAD36KP18CA/TR application, or MPLAD36KP18CA/TR equivalent, this device is selected for high-energy transient suppression where low thermal resistance (RθJC = 1.0 °C/W), fast response (<5 ns for bidirectional), and AEC-Q101 qualification are required in compact surface-mount form.
Technical Context
This bidirectional TVS operates in avalanche breakdown mode to clamp transients above VWM, with symmetrical forward/reverse conduction enabling AC-line and differential-signal protection. Its PLAD package features a metal base acting as cathode terminal, optimized for low junction-to-case thermal resistance.
It meets IEC 61000-4-5 (Class 1–5, 2–42 Ω source impedance), IEC 61000-4-2/4-4 (ESD/EFT), and RTCA DO-160G Waveform 4 & 5A pin injection standards. Temperature coefficient of VBR is ±16 mV/°C, supporting stable operation across –55 °C to +150 °C junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous DC or repetitive peak reverse voltage before clamping begins; matches 15 V nominal bus with margin. |
| VBR @ IBR | 20.0–22.1 V at 5 mA - Confirmed breakdown threshold ensures reliable turn-on without premature conduction. |
| VC @ IPP | 30.8 V at 60 A - Clamping voltage limits downstream IC stress during 10/1000 μs surges. |
| PPP | 36,000 W - Peak pulse power rating defines maximum single-event energy handling capability. |
| RθJC | 1.0 °C/W - Enables efficient heat transfer to heatsink or PCB copper, critical for multi-stroke reliability. |
| tCLAMP | <5 ns - Bidirectional response time ensures sub-nanosecond turn-on for fast-rising transients. |
| ID @ VWM | 60 µA max - Low leakage preserves signal integrity and minimizes standby power loss. |
Pinout & Package
The MPLAD36KP18CA/TR uses the PLAD surface-mount package: void-free UL94V-0 epoxy body with metal base acting as common cathode terminal; polarity marked on body; RoHS-compliant matte-tin plating; weight ≈1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode (Common) | Serves as primary heat path and electrical return; must be soldered to large copper pour or heatsink. |
| Top Surface Pad | Anode | Connects to protected line; bidirectional symmetry means either terminal may serve as input or return. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Enables symmetric clamping on AC lines or differential buses without polarity constraints. |
| AEC-Q101 qualification | Validates robustness for automotive powertrain and chassis systems under temperature cycling and humidity. |
| RTCA DO-160G Section 22 compliance | Confirms multi-stroke lightning immunity for aircraft avionics, including Waveform 4 (6.4/69 μs) and 5A (40/120 μs). |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life limitations-ready for standard SMT reflow without baking. |
| 3σ lot norm screening on ID | Ensures consistent low-leakage performance across production lots, critical for high-impedance sensor interfaces. |
Applications
| Aerospace Avionics Power Input | Automotive 12 V Battery Line |
|---|---|
Use Scenario: Protection of flight control computers and navigation receivers against lightning-induced surges per RTCA DO-160G Section 22. IC Role / Device Role / Timing Role: Primary surge clamp at main 28 V DC input, placed upstream of DC/DC converters and LDOs. Use Value: Withstands ≥50 multi-stroke events at 36 kW, maintaining clamping below 31 V to prevent downstream overvoltage damage. |
Use Scenario: Load dump suppression on vehicle battery rail during alternator regulation failure. IC Role / Device Role / Timing Role: High-power TVS shunting 120 V/400 ms transients generated by alternator field collapse. Use Value: 36,000 W rating and 1.0 °C/W RθJC enable safe dissipation without thermal runaway in confined engine bay layouts. |
| Industrial Motor Drive DC Bus | Telecom AC/DC Front-End |
Use Scenario: Secondary protection on 400 V DC bus against switching transients from IGBT commutation. IC Role / Device Role / Timing Role: Fast-clamping element parallel to bulk capacitors, limiting voltage overshoot during regenerative braking. Use Value: <5 ns response ensures clamping initiates before MOSFET gate oxide breakdown thresholds are exceeded. |
Use Scenario: Surge immunity enhancement on telecom power supply AC input per IEC 61000-4-5 Class 4 (42 Ω source). IC Role / Device Role / Timing Role: Bidirectional TVS across L-N and L/N-PE, suppressing common-mode and differential-mode transients. Use Value: Symmetrical 18 V VWM and 30.8 V VC ensure balanced clamping on both half-cycles of rectified AC input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Lower PPP (600 W), higher VC (29.2 V @ 19.9 A), SMB package with RθJC = 15 °C/W. | Suitable only for low-energy ESD/EFT; cannot meet DO-160G multi-stroke or load dump requirements. | Select only for cost-sensitive consumer electronics with <1 kV surge exposure. |
| SMCJ18CA | Medium PPP (1500 W), same VWM/VC, SMC package with RθJC = 3.5 °C/W. | Meets IEC 61000-4-5 Class 3 but fails Class 4/5 and DO-160G Waveform 4/5A due to energy limitation. | Choose when board space allows larger SMC footprint and application requires moderate surge robustness. |
Compared with SMBJ18CA and SMCJ18CA, the MPLAD36KP18CA/TR delivers 60× and 24× higher peak power handling respectively, with 15× and 3.5× lower thermal resistance-enabling reliable operation in mission-critical aerospace and heavy-duty automotive environments where multi-pulse survivability is mandatory.
Availability
MPLAD36KP18CA/TR is available at Aetrix Electronics and suitable for aerospace avionics, automotive battery line protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MPLAD36KP18CA/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) designs high-reliability analog, mixed-signal, and power semiconductors for aerospace, defense, and industrial markets.
The MPLAD36KP18CA/TR belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning and load dump protection in safety-critical systems where thermal management and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of MPLAD36KP18CA/TR at its rated peak pulse current?
The MPLAD36KP18CA/TR has a maximum clamping voltage (VC) of 30.8 V at 60 A peak impulse current (IPP) under the 10/1000 μs waveform. This value is measured across the device terminals during standardized surge testing and defines the upper voltage limit imposed on protected circuitry during transient events. The MPLAD36KP18CA/TR maintains this clamping performance consistently due to its low RθJC and robust silicon design.
Is MPLAD36KP18CA/TR suitable for automotive applications per AEC-Q101?
Yes, the MPLAD36KP18CA/TR is explicitly AEC-Q101 qualified, confirming its suitability for automotive powertrain and chassis applications. This qualification includes stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life. The MPLAD36KP18CA/TR's 18 V VWM and 36,000 W rating make it appropriate for 12 V battery line load dump protection, satisfying ISO 7637-2 and SAE J1113-11 requirements when properly mounted.
How does the PLAD package of MPLAD36KP18CA/TR improve thermal performance?
The PLAD package of MPLAD36KP18CA/TR features a metal base that serves as both the cathode terminal and primary thermal path, achieving a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W. This is 15× lower than standard SMB packages and enables rapid heat transfer to PCB copper or external heatsinks. As a result, the MPLAD36KP18CA/TR sustains repeated high-energy surges without thermal runaway-critical for DO-160G multi-stroke compliance.
Does MPLAD36KP18CA/TR meet RTCA DO-160G Section 22 lightning standards?
Yes, the MPLAD36KP18CA/TR is designed and tested to meet RTCA DO-160G Section 22 for lightning-induced transient susceptibility. It passes Waveform 4 (6.4/69 μs) up to Level 5 and Waveform 5A (40/120 μs) up to Level 4, verified through full-system surge testing. The MPLAD36KP18CA/TR's <5 ns response time and 36,000 W rating ensure reliable clamping across all specified multi-stroke test sequences.
What is the maximum steady-state power dissipation of MPLAD36KP18CA/TR at 100 °C case temperature?
At 100 °C case temperature (TC), the MPLAD36KP18CA/TR supports a steady-state power dissipation (PD) of 504 W, as specified in the Absolute Maximum Ratings table. This high continuous rating-enabled by its ultra-low RθJC-allows integration into thermally demanding environments such as engine control units or avionics cabinets where ambient temperatures exceed 85 °C. The MPLAD36KP18CA/TR derates linearly from 2.51 W at 25 °C to 504 W at 100 °C.
MPLAD36KP18CA/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 30.8V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- Power - Peak Pulse:
- 36000W (36kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD36KP18CA/TR FAQ
1.How can I place an order for MPLAD36KP18CA/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP18CA/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPLAD36KP18CA/TR reliable?
The price and inventory of MPLAD36KP18CA/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP18CA/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP18CA/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP18CA/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP18CA/TR?
MPLAD36KP18CA/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP18CA/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPLAD36KP18CA/TR?
For technical support, including MPLAD36KP18CA/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP18CA/TR requirements.
6.How does Aetrix verify that MPLAD36KP18CA/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP18CA/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPLAD36KP18CA/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP18CA/TR?
All MPLAD36KP18CA/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP18CA/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPLAD36KP18CA/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP18CA/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP18CA/TR Tags
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